Comment by P D on October 7, 2010 at 1:00pm

Hi Joirdi, I'm having some problems updating the GPS Firmware (my Lon values are completely out of range, Lat is O.K.). Now I don't have an FTDI cable, so i'm stuck with the pass through method using the script in the manual (attached). I am using the APM.

Which baudrates should I set in the script, and what baud rate should the flash tool be communicating with?
I Tried 38400 for the APM (IMU?) and 9600 or 115200 for the GPS. Set the flash tool at 38400.

Result: [Flash Download],Fail!!(Download) DL_HANDLE error code,[Finish]

void setup()
{
Serial.begin(38400); // FTDI; this is the speed at which the IMU board is communicating with your PC
Serial1.begin(9600); // GPS; 9600 is the usual default for NMEA GPS modules
delay(10000);
}
void loop()
{
if (Serial.available())
Serial1.write(Serial.read());
if (Serial1.available())
Serial.write(Serial1.read());
}

Comment by AS on October 13, 2010 at 8:46am

I got a mediatek with an adapter, but want to use it with USB, any ideas to make it work?

Best Regards
AS

Admin Comment by Thomas J Coyle III on October 13, 2010 at 9:02am

Andre,

You will have to get serial TTL level to USB converter like the FTDI cable. Jordi sells a MediaTek to FTDI cable adapter. Check the DIY Drones store for availability.

Regards,
TCIII

Comment by AS on October 13, 2010 at 10:39am

Hi TCII,

Yes, I have a FTDI cable, and it works like a charm, but de Mediatek GPS has D+ and D- ports to direct use with USB, what I wanted is to use the adapter linked directly to a USB cable without the FTDI in the middle. I already cutted the IN and OUT strips and soldered two wire from D+ and D- to IN and OUT pads. But the

Sorry for the bad english :\

Regards,
AS

Comment by Preston on December 28, 2010 at 1:35pm

I think this firmware update is the root of my problems....however, the update fails every time with the error ...
Fail!!(Download) BROM_CMD_START_FAIL
I am using an APM with IMU. I have loaded the pass through code. This is a show stopper. Any help?

Preston.

3D Robotics Comment by Chris Anderson on December 28, 2010 at 1:43pm

Yeah, I don't think the pass-through code will work with this version. You'll need a proper FTDI cable.

I've updated the manual to make this clear.

Comment by Preston on December 28, 2010 at 6:28pm

Excellent.  I will give this a shot in the AM and post my success.  Thanks for the fast response.  I love open source project!

Comment by Preston on December 29, 2010 at 7:38am

Ahhh the coveted green 'O'! Using the FTDI connection direct to the gps allowed the firmware update to complete. With the new firmware, I am no longer in the Aegean Sea. Welcome back to S.W. Ohio!
Thanks for your help.

Comment by Henry Gan on January 16, 2011 at 11:38pm

Recently just bought a new mediatek gps from DIYdrones. I have connected the mediatek gps with ftdi cable. I run the powerflash.exe as per instructions from the Arducopter googles page. I link to the 115200 baud and correct com port and selected the agent file and ROM file but it will fail the downloading. (BROM_CMD_START_FAIL)...

 

I have tried changing the baud rate and swopping the tx and rx cable but still fail the downloading.

 

Any advise?

Comment by Sravan Kumar on March 20, 2012 at 11:15am

IM using MediaTek 2239 GPS with ArduIMU V3. When im uploading the frimware to module i got the error

Fail!!(Download)   DL_HANDLE error code

Please any one can help me?

Comment

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